Design of Concrete Structures for Thermal Effects


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Title: Design of Concrete Structures for Thermal Effects

Author(s): J. Pajuhesh

Publication: Journal Proceedings

Volume: 77

Issue: 2

Appears on pages(s): 74-77

Keywords: cracking (fracturing); expansion; loads (forces); moments; reinforced concrete; relaxation (mechanics); stress-strain relationships; structural design; thermal properties; thermal stresses.

Date: 3/1/1980

Investigation of the thermal relaxation problem is extended beyond an earlier paper by developing an interaction diagram type of solu tion for design of reinforced concrete sections subject to relaxing-type loading (such as effects of thermal force and moment) in addition to sustained-type loading (such as vertical loads). The formulation is presented for a parabolic stress-strain relation for concrete and a given set of design criteria. The formulation of the solution is generalized to make the interaction diagram approach more readily available, and samples of specific diagrams are shown. Finally, a comparative study is made for a numerical example to indicate the importance of considering thermal effects.